# git rev-parse -q --verify 0823c68b054bca9dc321adea829af5cf36afb30b^{commit}
0823c68b054bca9dc321adea829af5cf36afb30b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 0823c68b054bca9dc321adea829af5cf36afb30b
# git clean -qxdf
# < git log -1
# commit 0823c68b054bca9dc321adea829af5cf36afb30b
# Author: Hari Bathini <hbathini@linux.ibm.com>
# Date:   Fri Sep 14 19:36:02 2018 +0530
# 
#     powerpc/fadump: re-register firmware-assisted dump if already registered
#     
#     Firmware-Assisted Dump (FADump) needs to be registered again after any
#     memory hot add/remove operation to update the crash memory ranges. But
#     currently, the kernel returns '-EEXIST' if we try to register without
#     uregistering it first. This could expose the system to racing issues
#     while unregistering and registering FADump from userspace during udev
#     events. Spare the userspace of this and let it be taken care of in the
#     kernel space for a simpler interface.
#     
#     Since this change, running 'echo 1 > /sys/kernel/fadump_registered'
#     would result in re-regisering (unregistering and registering) FADump,
#     if it was already registered.
#     
#     Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
#     Acked-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < git log --format=%s --max-count=1 0823c68b054bca9dc321adea829af5cf36afb30b
# < make -s -j 120 ARCH=sparc64 O=/kisskb/build/powerpc-next_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  defconfig
# make -s -j 120 ARCH=sparc64 O=/kisskb/build/powerpc-next_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/image is ready
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-next_sparc64-defconfig_sparc64
# Build took: 0:00:26.658741